"Do I need a CDN?" comes up in my training sessions almost as often as "which caching plugin should I take?" — and the honest answer is: for most WordPress sites it is worth it, but the three common providers solve the task very differently. Cloudflare, BunnyCDN and KeyCDN all three appear in performance recommendations, but differ fundamentally in approach: a DNS proxy with an all-round package versus a pure pay-as-you-go asset CDN. You will find an overview of all my tool comparisons in the WordPress tool comparisons overview — here I go into depth on CDNs.
The three providers at a glance
Cloudflare (free entry, Pro plan around $20/month, as of 2026): not a pure CDN but a complete DNS proxy service. You change your name servers to Cloudflare, and from then on all traffic to your domain runs through their network — including a free CDN with unlimited bandwidth, DDoS protection and a basic firewall. The Pro plan adds image optimisation, extended WAF rules and more performance features.
BunnyCDN (pay as you go, from around $0.01/GB in North America/Europe, as of 2026): a pure asset CDN with no DNS proxy step in between. You put BunnyCDN in front of your existing images, CSS and JS files as a pull zone — the rest of your infrastructure stays unchanged. Several storage regions including the EU can be selected; the first region costs $0.01/GB, with each additional region cheaper from the third onwards.
KeyCDN (pay as you go, from around $0.04/GB in North America/Europe, as of 2026): technically very similar to BunnyCDN — a pure asset CDN, no DNS proxy, billed by data volume actually used. The difference lies in the company's location: KeyCDN is operated by proinity LLC in Winterthur, Switzerland — for clients with strict requirements on data residency and Swiss data protection law, an argument in its own right.
Comparison at a glance
| Criterion | Cloudflare | BunnyCDN | KeyCDN |
|---|---|---|---|
| Pricing model | Free + Pro/Business subscription | Pay as you go per GB | Pay as you go per GB |
| Free tier | ✅ Very generous | ❌ (from $1/month minimum) | ❌ (from $4/month minimum) |
| Server locations/EU options | Global network, EU included | Several regions selectable, EU available | EU core market, Swiss company base |
| DNS proxy vs. pure asset CDN | DNS proxy (entire domain) | Pure asset CDN (pull zone) | Pure asset CDN (pull zone) |
| Firewall/DDoS protection included | ✅ Yes, from the free tier | ❌ Not a core function | ❌ Not a core function |
| Setup effort with WordPress | Low (name servers + plugin) | Medium (pull zone + rewrite plugin) | Medium (pull zone + rewrite plugin) |
Cloudflare — my standard recommendation for solopreneurs & SMEs
Strengths: The free tier is by far the simplest way in that I know. Change the name servers, done — you get unlimited bandwidth over a global network, DDoS protection and a basic firewall without spending a cent. For most of my clients with business sites, blogs or small shops, that is exactly the right ratio of effort to benefit. The Pro plan (around $20/month) adds lossless image optimisation, AMP support and sharper WAF rules if you want more.
Weaknesses: Because Cloudflare sits as a DNS proxy in front of your entire domain, it reaches deeper into your infrastructure than a pure asset CDN — changes to DNS records, email routing (MX records) or SSL certificates now run through Cloudflare. In practice that is rarely a problem, but it demands a little more care during initial setup than a simple pull-zone CDN.
When to choose Cloudflare: the standard case — solopreneurs, SME websites, blogs, small to mid-sized WooCommerce shops. When you want CDN, firewall and DDoS protection in one go and with no ongoing costs.
BunnyCDN — the cheapest pure asset CDN
Strengths: An extremely low price per GB, transparent billing with no hidden costs, and selectable EU storage regions. Because BunnyCDN does not interfere with your DNS management, your existing infrastructure (hosting, email, SSL) remains entirely untouched — you simply put a pull zone in front of your static assets. For pure image/CSS/JS delivery, the value for money is hard to beat.
Weaknesses: No integrated firewall or DDoS protection, and no free tier — you pay from the first megabyte, albeit minimally. Setting it up with WordPress requires a rewrite plugin (CDN Enabler, for example) that rewrites your asset URLs to the BunnyCDN domain — an additional configuration step compared with Cloudflare's name server change.
When to choose BunnyCDN: when you deliberately do not want DNS-level proxying (because your hosting or a firewall solution already covers DDoS protection, for example), or when you prefer a pure pay-as-you-go model with no subscription commitment and do not mind the small amount of extra setup.
KeyCDN — the Swiss alternative for data residency questions
Strengths: Technically almost identical to BunnyCDN — a pure pay-as-you-go asset CDN with no subscription requirement. The decisive difference is the company base in Switzerland: for clients who explicitly require Swiss data protection law or a legal system close to but not bound by the EU, for legal or contractual reasons, that is an argument in its own right which neither Cloudflare (a US corporation) nor BunnyCDN (Slovenia/EU) offers in the same form.
Weaknesses: A somewhat higher price per GB than BunnyCDN, no free tier, and a leaner feature set than Cloudflare — no integrated firewall or DDoS protection. The setup resembles BunnyCDN's: set up a pull zone, configure a rewrite plugin.
When to choose KeyCDN: when you want a pure asset CDN and Swiss data residency is a genuine criterion, contractually or because a client demands it — for law firms, financial service providers or organisations with explicit data protection requirements beyond the GDPR, for example.
Would you rather not guess which CDN suits your hosting and your risk tolerance? In my online course we set up the right CDN configuration together — including the name server change or pull zone configuration, depending on what actually makes sense for your site. → To the online course
Direct comparison: the details that count
| Feature | Cloudflare | BunnyCDN | KeyCDN |
|---|---|---|---|
| Bandwidth in the free tier | Unlimited | No free tier | No free tier |
| Image optimisation included | Pro plan (lossless) | Optional at extra cost (Bunny Optimizer) | Not included |
| WAF / firewall rules | ✅ From the free tier, more in Pro/Business | ❌ | ❌ |
| DDoS protection | ✅ Included, all plans | ❌ Not a core function | ❌ Not a core function |
| Caching control (page rules) | ✅ Comprehensive | Via HTTP headers/plugin | Via HTTP headers/plugin |
| Analytics dashboard | ✅ Detailed, all plans | ✅ Solid | ✅ Solid |
| Billing model | Fixed price per month | Pay as you go per GB | Pay as you go per GB |
| Contract commitment | Cancellable monthly | None, pure credit model | None, pure credit model |
| WordPress plugin integration | Official Cloudflare plugin | CDN Enabler / W3 Total Cache / WP Rocket | CDN Enabler / W3 Total Cache / WP Rocket |
Prices compared (as of 2026)
- Cloudflare: a free tier with unlimited bandwidth, a basic CDN, DDoS protection and five page rules. The Pro plan is around $20/month billed annually ($25/month billed monthly), the Business plan around $200/month billed annually. For most WordPress sites the free tier is entirely sufficient.
- BunnyCDN: the standard network from $0.01/GB in North America/Europe, with a minimum spend of around $1/month. Storage regions cost extra from $0.01/GB per region (the first two regions), cheaper from the third region. No subscription, purely usage-based.
- KeyCDN: from $0.04/GB for the first 10 TB in North America/Europe, with declining tiered prices at higher volumes ($0.03/GB, $0.02/GB, and from 100 TB just $0.01/GB). Minimum spend around $4/month. Likewise no subscription requirement.
Important with all three: prices change, and the pay-as-you-go models from BunnyCDN and KeyCDN in particular depend heavily on your site's actual traffic. The figures given are list prices as of 2026 — with strongly fluctuating traffic (seasonal shops, for example), calculate with the upper end of your expected data volume.
Who is each one suited to?
The solopreneur or SME website with no technical staff: Cloudflare. A free entry, one setup step (name servers), and you get CDN, firewall and DDoS protection bundled — with no ongoing costs and without having to monitor GB usage.
The technically confident operator who wants pure asset delivery at the lowest possible price: BunnyCDN. If DNS-level proxying is not wanted — because another firewall solution is already running, for example — and you are willing to set up a pull zone and a rewrite plugin, you get the best value for money on the market.
The organisation with explicit data residency requirements: KeyCDN. If a client, a law firm or an internal compliance requirement specifically asks for a Swiss server location or legal system, KeyCDN is the obvious choice among the pure asset CDNs.
My conclusion
For most solopreneurs and SMEs, Cloudflare remains my standard recommendation — the free entry is unbeatable, the setup is done in a few minutes, and with the firewall and DDoS protection you get several security layers thrown in that you would otherwise have to set up separately. I would recommend BunnyCDN and KeyCDN specifically when you deliberately want a pure pay-as-you-go asset CDN without DNS-level proxying, or when — as with KeyCDN — a concrete EU or Swiss data residency requirement is on the table. The trade-off is always the same: Cloudflare's free tier is the simplest way in, but it ties you to a DNS proxy for your entire domain. Anyone who deliberately wants to avoid that pays a small but fair amount at BunnyCDN or KeyCDN for a leaner, purer tool.
A CDN is incidentally only one building block of several — combined with a clean caching setup you get considerably more out of your loading times. Details in my comparison WP Rocket vs. Perfmatters vs. LiteSpeed Cache. And if the hosting itself is the bottleneck, it is worth first looking at my comparison Managed WordPress hosting.
Frequently asked questions
Do I need a CDN at all for a small WordPress site?
On a very small, locally focused site with little traffic the effect is noticeably smaller than on an internationally visited site. Even so I almost always recommend it: Cloudflare's free tier costs nothing, brings DDoS protection and a firewall along with it, and setup takes less than 15 minutes. With zero ongoing costs the effort-to-benefit ratio is practically always positive.
Doesn't a CDN actually slow my site down, because an extra stop is added in between?
As a rule, no. Static assets (images, CSS, JS) are delivered by the CDN edge server, which is closer to your visitors than your origin server — in almost all cases that is faster, not slower. Only with extremely well-connected origin servers in the immediate vicinity of the audience can the difference turn out minimal.
Can I use Cloudflare and a caching plugin such as WP Rocket at the same time?
Yes, that is a common and sensible combination. Cloudflare handles delivery over the global network and the security layer; WP Rocket takes care of server-side or PHP-based caching, minification and lazy loading. Just remember to use "development mode" in Cloudflare while testing changes during setup, to avoid cache conflicts.
What exactly is the difference between a pull-zone CDN and Cloudflare's approach?
With Cloudflare, all traffic to your domain runs through their network — DNS, HTML, images, everything. With BunnyCDN and KeyCDN your origin server remains directly reachable for HTML/PHP, and only the static assets defined in a pull zone (usually /wp-content/uploads/, CSS, JS) are delivered via the CDN. The latter is more surgical, but you forgo firewall and DDoS protection at DNS level.
Is it worth switching from Cloudflare to BunnyCDN or KeyCDN later?
Technically straightforward, but rarely necessary. A switch is mainly worthwhile when you notice you are not using Cloudflare's additional functions (firewall, DNS management) at all and would prefer a leaner, pure asset CDN — or when a concrete data residency requirement newly arises.
Do I absolutely need a plugin for BunnyCDN or KeyCDN?
Not absolutely, but strongly recommended. Without a rewrite mechanism you would have to adjust every asset URL in your content to the CDN domain manually. Plugins such as CDN Enabler do this automatically and are compatible with both providers.
If you want not just to enable a CDN but to align your entire performance architecture — hosting, caching, CDN, image optimisation — my online course is the pragmatic route: together we analyse your setup and configure the combination that actually fits your site. → To the online course
Image source, featured & inline: illustrations created specifically in the pletzenauer design (no stock photos).
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